Nexperia USA Inc. BZT52H-A4V3X

Overview

BZT52H-A4V3X from Nexperia is a general-purpose Zener diode in SOD123F surface-mount package, designed for precision voltage regulation and reference functions at 4.3 V nominal breakdown voltage with ±1 % tolerance, 95 Ω maximum differential resistance at I_Z = 5 mA, and 830 mW total power dissipation at T_amb ≤ 25 °C - used in low-power analog biasing and overvoltage clamping circuits.

For engineers reviewing the BZT52H-A4V3X datasheet, BZT52H-A4V3X pinout, BZT52H-A4V3X application, or BZT52H-A4V3X equivalent, this page delivers verified Zener parameters including V_Z, I_Z, r_dif, temperature coefficient, reverse current limits, and thermal resistance - critical for stable reference design in space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse-bias breakdown mode with tightly controlled V_Z = 4.25–4.35 V at I_Z = 5 mA and exhibits a negative temperature coefficient of −3.5 to 0.0 mV/K, enabling predictable drift compensation in reference circuits. Its low 95 Ω dynamic impedance ensures minimal output variation under load changes.

The device supports pulsed reverse currents up to 6.0 A (t_p = 100 μs) and maintains stable regulation across −65 °C to +150 °C ambient range, with thermal resistance from junction to solder point at 70 K/W - optimized for FR4 PCB mounting with 1 cm² cathode pad.

Key Specifications

Pinout & Package

SOD123F plastic surface-mount package: 2-terminal, flat lead, 3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height; cathode marked by bar on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with BZT52H-A4V3X, the BZT52H-B4V3 trades 1 % accuracy for broader tolerance at identical thermal and dynamic performance, while MMSZ4V3 sacrifices both precision and power capability - making the A-grade part essential for high-fidelity analog references.

Availability

BZT52H-A4V3X is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and analog biasing requiring stable component supply in industrial control, sensor signal conditioning, and embedded power management.

Supply support for BZT52H-A4V3X includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for cost-effective, space-efficient voltage regulation in consumer, industrial, and computing applications - emphasizing tight tolerance, low impedance, and robust thermal performance in miniature SMD packages.

FAQ

What is the maximum continuous reverse current for BZT52H-A4V3X at 25 °C ambient?

The device does not specify a maximum continuous reverse current; instead, it defines total power dissipation (830 mW) as the limiting factor. At V_Z = 4.3 V, this corresponds to a maximum steady-state Zener current of approximately 193 mA (830 mW ÷ 4.3 V), assuming no additional thermal resistance beyond the specified R_th(j-a) = 330 K/W.

Can BZT52H-A4V3X be used in automotive applications?

No - per Nexperia's revision history (Rev. 7, Jan 2023), the BZT52H series is explicitly designated as non-automotive qualified. It lacks AEC-Q101 qualification and has not undergone automotive-grade stress testing; automotive designs require Nexperia's separate -Q qualified variants such as BZT52H-A4V3X-Q.

How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

With a specified SZ of −3.5 to 0.0 mV/K at I_Z = 5 mA, the worst-case V_Z drift over 165 K temperature span is ±578 mV (165 × 3.5 mV). However, actual measured drift is typically <±150 mV due to curvature effects - confirmed in Figure 6 of the datasheet for 4.3 V types.

Is the SOD123F package compatible with standard SOD-123 reflow footprints?

Yes - the SOD123F outline (3.4–3.6 mm × 2.5–2.7 mm) matches the JEDEC-standard SOD-123 dimensions, and Nexperia provides identical reflow soldering footprint recommendations (2.8 mm × 1.6 mm land, 1.1 mm pad spacing) as for legacy SOD-123, ensuring drop-in compatibility in existing PCB designs.